My site is located at https://www.newbreedgaming.com We are also receiving a large amount of spam from hotmail accounts and also @mailnesia.com accounts which is a public email adress that automatically confirms account registrations, i feel that that domain should be completely blocked as it is literally a tool for spammers but the best way to go would be allow us to use a good captcha easily rather than having to go into the code and potentially break the plugin itself.
Thank you very much for replying, it shows a great commitment to your users!